Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!wuarchive!wugate!uunet!portal!cup.portal.com!Hoke
From: Hoke@cup.portal.com (Hoke S Johnson)
Newsgroups: comp.graphics
Subject: Re: VGA 360x480x256 color mode on standard VGA
Message-ID: <23414@cup.portal.com>
Date: 27 Oct 89 06:53:39 GMT
References: <4945@wpi.wpi.edu> <23219@cup.portal.com>
  <3628@vanuata.cs.glasgow.ac.uk>
Organization: The Portal System (TM)
Lines: 15

Alan,

By directly programming the registers of the VGA card it is possible
to setup a 360x480x256 color mode on the plain VGA card.  I found out
about this from an article in the Sept/Oct 1989 Programmer's Journal
magazine Volume 7.5 .  The aspect ratio is strange, the pixels are
almost twice as wide as they are high.  It is also possible to get
a 320x400x256 color mode on the plain VGA card also.  To write to the
screen in these modes you have to write your own driver since the 
VGA bios doesn't support these modes.  If there is interest, I could
post a turbo pascal routine which sets the 360x480x256 mode and show an
example of how to write a scan line of pixels.

Hoke Johnson
hoke@cup.portal.com